106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
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*
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* Drives the local APIC in "clustered mode".
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*/
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#include <linux/cpumask.h>
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#include <linux/dmi.h>
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#include <linux/smp.h>
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#include <asm/apic.h>
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#include <asm/io_apic.h>
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#include "local.h"
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static u32 bigsmp_get_apic_id(u32 x)
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{
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return (x >> 24) & 0xFF;
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}
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static void bigsmp_send_IPI_allbutself(int vector)
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{
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default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
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}
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static void bigsmp_send_IPI_all(int vector)
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{
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default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
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}
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static int dmi_bigsmp; /* can be set by dmi scanners */
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static int hp_ht_bigsmp(const struct dmi_system_id *d)
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{
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printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
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dmi_bigsmp = 1;
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return 0;
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}
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static const struct dmi_system_id bigsmp_dmi_table[] = {
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{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
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{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
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DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
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}
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},
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{ hp_ht_bigsmp, "HP ProLiant DL740",
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{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
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DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
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}
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},
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{ } /* NULL entry stops DMI scanning */
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};
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static int probe_bigsmp(void)
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{
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return dmi_check_system(bigsmp_dmi_table);
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}
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static struct apic apic_bigsmp __ro_after_init = {
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.name = "bigsmp",
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.probe = probe_bigsmp,
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.dest_mode_logical = false,
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.disable_esr = 1,
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.cpu_present_to_apicid = default_cpu_present_to_apicid,
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.max_apic_id = 0xFE,
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.get_apic_id = bigsmp_get_apic_id,
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.calc_dest_apicid = apic_default_calc_apicid,
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.send_IPI = default_send_IPI_single_phys,
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.send_IPI_mask = default_send_IPI_mask_sequence_phys,
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.send_IPI_mask_allbutself = NULL,
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.send_IPI_allbutself = bigsmp_send_IPI_allbutself,
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.send_IPI_all = bigsmp_send_IPI_all,
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.send_IPI_self = default_send_IPI_self,
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.read = native_apic_mem_read,
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.write = native_apic_mem_write,
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.eoi = native_apic_mem_eoi,
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.icr_read = native_apic_icr_read,
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.icr_write = native_apic_icr_write,
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.wait_icr_idle = apic_mem_wait_icr_idle,
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.safe_wait_icr_idle = apic_mem_wait_icr_idle_timeout,
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};
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bool __init apic_bigsmp_possible(bool cmdline_override)
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{
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return apic == &apic_bigsmp || !cmdline_override;
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}
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void __init apic_bigsmp_force(void)
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{
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if (apic != &apic_bigsmp)
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apic_install_driver(&apic_bigsmp);
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}
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apic_driver(apic_bigsmp);
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